CASR |
: | 7757-83-7 |
Molecular Formula |
: | Na2SO3 |
Molecular Weight |
: | 126.04 |
Specifications | |
---|---|
Appearance: | White or almost white powder. |
Solubility: | Freely soluble in water, very slightly soluble in ethanol(96%) |
Identification A (By Chemical test): | Solution should slightly alkaline. |
Identification B (sulfate): | A white precipitate should form. |
Identification C (Sodium): | A dense white precipitate should form. |
Identification D (By Assay): | 95.0% to 100.5% |
Appearance of solution: | Clear and colourless solution. |
Thiosulphate(S2O3): | NMT 0.1% |
Iron(Fe): | NMT 10ppm |
Zinc (Zn): | NMT 25ppm |
Assay: | 95.0% to 100.5% |